NANO MATERIAL AND PREPARATION METHOD THEREFOR, AND QUANTUM DOT LIGHT-EMITTING DIODE

摘要

A nano material and a preparation method therefor, and a quantum dot light-emitting diode. The nano material has a core-shell structure; the core of the nano material comprises: ZnO nanoparticles, and metal elements doped in the ZnO nanoparticles; and the shell of the nano material comprises: metal oxide. By doping other metal elements in the zinc oxide nanoparticles and wrapping with a layer of metal oxide shell, the energy level structure and electron transport efficiency of the whole nano material can be adjusted, so that the energy levels of quantum dots and the nano material in a device are more matched, the transfer of electrons in the quantum dot light-emitting layer to an electron transport layer is reduced, and the electron hole recombination efficiency of the quantum dot light-emitting layer is improved. In this way, the electron hole injection of the device is more balanced, and the charge accumulation of the quantum dot light-emitting layer is reduced, suppressing Auger recombination, and improving the radiative recombination efficiency of electron holes; and the zinc oxide nanoparticles are more stable, improving the overall stability of the device.